Sniffers sensed other things but the strength of others' souls, though? From their magical alignments, control of self, to emotional states?
(Random: I was assumed Gerald was so surprised at not sensing Immanuel after he had been turned because he was not a sniffer, and could be sensed before? Or are necromancers (or can they be) skilled enough to pick out sniffers regardless of them being sniffers? I recall Gerald could pick up that Aemoten's rather calm demeanor and actual state did not match up, for instance.)

(Did you miss ASTA's post on the last page, or are you simply thinking over it? I can never tell, hence me reiterating things when you post but make no comment about them.)